Single Turbo RX-7's Questions about all aspects of single turbo setups.

Single turbo no intercooler questions

Thread Tools
 
Search this Thread
 
Old Jun 10, 2009 | 12:40 PM
  #26  
PvillKnight7's Avatar
Rotary Freak
Tenured Member: 20 Years
iTrader: (16)
 
Joined: May 2002
Posts: 2,597
Likes: 3
From: Maryland
Originally Posted by Viking War Hammer
i had bad results with this, no intercooler and two M14 nozzles spraying methanol......... my intake temps never dropped below 220 f
...and I thought 120F was bad. 220F is redic
Reply
Old Jun 10, 2009 | 12:56 PM
  #27  
Viking War Hammer's Avatar
*** Bless The USA
Tenured Member 15 Years
iTrader: (8)
 
Joined: Jan 2007
Posts: 7,140
Likes: 0
From: Saint Louis / Illinois
Yep, so needless to say............. I'll be puchasing a intercooler shortly. not sure if I want a air to air or water to air......... space is limited.
Reply
Old Jun 10, 2009 | 02:28 PM
  #28  
Trots*88TII-AE*'s Avatar
4th string e-armchair QB
Tenured Member 15 Years
iTrader: (11)
 
Joined: May 2005
Posts: 2,745
Likes: 0
From: North Bay, Ontario
Did you try changing placement or adding a pre-turbo nozzle? Just for testing's sake to see if any of the above truly affects air temps or not.
Reply
Old Jun 10, 2009 | 02:42 PM
  #29  
Viking War Hammer's Avatar
*** Bless The USA
Tenured Member 15 Years
iTrader: (8)
 
Joined: Jan 2007
Posts: 7,140
Likes: 0
From: Saint Louis / Illinois
Originally Posted by Trots*88TII-AE*
Did you try changing placement or adding a pre-turbo nozzle? Just for testing's sake to see if any of the above truly affects air temps or not.
No, it was already at 220f...........even if I got it to drop a little, I wasn't even close to where I needed to be.
Reply
Old Jun 10, 2009 | 05:42 PM
  #30  
Trots*88TII-AE*'s Avatar
4th string e-armchair QB
Tenured Member 15 Years
iTrader: (11)
 
Joined: May 2005
Posts: 2,745
Likes: 0
From: North Bay, Ontario
K, so what was so different about your setup than others who have gone intercooler-less with good results? Not enough Meth? way more heat from the turbo? It's something I've considered as well and would like to know specifically why it wouldn't work.
Reply
Old Jun 11, 2009 | 12:03 AM
  #31  
enzo250's Avatar
IRS Champion
Tenured Member 10 Years
 
Joined: Aug 2001
Posts: 2,038
Likes: 1
From: NY
Because it's running big boost...

the guys running intercoolerless are running 15lbs of boost.. That's not a big deal and you can get away without running an intercooler at low levels of boost... well at least some people can.. Other's arent so lucky and break plates and then look for other excuses as to why it's breaking
With big boost comes heat.. You can't get away from that..
Reply
Old Jun 11, 2009 | 12:31 AM
  #32  
Trots*88TII-AE*'s Avatar
4th string e-armchair QB
Tenured Member 15 Years
iTrader: (11)
 
Joined: May 2005
Posts: 2,745
Likes: 0
From: North Bay, Ontario
so how much meth would it take to fully cool down that s475 at 28lbs of boost? Would using only meth as fuel be the only way?
Reply
Old Jun 11, 2009 | 01:23 AM
  #33  
enzo250's Avatar
IRS Champion
Tenured Member 10 Years
 
Joined: Aug 2001
Posts: 2,038
Likes: 1
From: NY
Yes running on methanol will be ok as the amounts required to run the engine will cool the charge enough..
Even then running an intercooler will be a benefit as you will require less fuel and less fuel means more space for air.. Not to mention cooler air temps.. Remember the motor is only so big and filling it up with ton's of fuel doesn't leave much room for air..

I will have more details soon but on average you can expect roughly 100hp gains from an intercooler compared to not running it..
Reply
Old Jun 11, 2009 | 01:58 AM
  #34  
Trots*88TII-AE*'s Avatar
4th string e-armchair QB
Tenured Member 15 Years
iTrader: (11)
 
Joined: May 2005
Posts: 2,745
Likes: 0
From: North Bay, Ontario
Originally Posted by enzo250
Remember the motor is only so big and filling it up with ton's of fuel doesn't leave much room for air..
Unless you're running oxygenated fuel though. Which brings my next question, is Q16 oxygenated? I agree though, having an intercooler will always be better
Reply
Old Jun 11, 2009 | 06:38 AM
  #35  
ErnieT's Avatar
Living life 9 seconds at a time
Tenured Member: 20 Years
iTrader: (2)
 
Joined: Feb 2001
Posts: 6,541
Likes: 0
From: Abingdon, Md
Question is, why the hell would you even risk it? Makes no sense. Even if you run all meth, running an intercooler is still a good idea. Hell, with a rotary you guys should know better than try and take short cuts.
Reply
Old Jun 11, 2009 | 06:50 AM
  #36  
Viking War Hammer's Avatar
*** Bless The USA
Tenured Member 15 Years
iTrader: (8)
 
Joined: Jan 2007
Posts: 7,140
Likes: 0
From: Saint Louis / Illinois
Originally Posted by enzo250
Because it's running big boost...

the guys running intercoolerless are running 15lbs of boost.. That's not a big deal and you can get away without running an intercooler at low levels of boost... well at least some people can.. Other's arent so lucky and break plates and then look for other excuses as to why it's breaking
With big boost comes heat.. You can't get away from that..
Do you think I should try a water/air intercooler with a heat exchanger up front? Or, should I try and cram a front mount in there?

I've seen good data with a water/air intercooler with a icebox but haven't seen too much info on one with a heat exchanger...
Reply
Old Jun 11, 2009 | 08:55 AM
  #37  
ChrisRX8PR's Avatar
Rotary Enthusiast
Tenured Member 10 Years
 
Joined: Oct 2007
Posts: 799
Likes: 3
From: Plymouth, MN
Originally Posted by Viking War Hammer
Do you think I should try a water/air intercooler with a heat exchanger up front? Or, should I try and cram a front mount in there?

I've seen good data with a water/air intercooler with a icebox but haven't seen too much info on one with a heat exchanger...
I have an air to water system on my setup and after reading lots of threads on different forums it basically comes down to having the proper "radiator" up front to handle the heat. Water is better at removing heat than air, hence why most engines are water cooled.

I actually saw a drop in IAT's and I don't just mean instantly, I mean in general. Specially when in traffic and on long stop and go hard driving. This is mainly due to the fact that even when you loose speed or get off the throttle the pump keeps circulating the water just as fast and the fan behind the heat exchanger keeps pulling air through it so when you are sitting still you IAT's drop instead of getting heat soak. The trick is to have enough water, enough pump flow and enough radiator to manage the heat from the compressed air.

I have a 7" X 2" X 26" Alum Heat exchanger with a 7" fan up front and a 500gph pump and its all using 3/4" Diam hose which is pretty big. And the heat exchanger has both inlets on the same side so the water travels 26" to one side on the top half of the core, comes around and travels thought the bottom of the core on the way back another 26" The intercooler core is 4.5" Thick and 12.25" Tall and 5.0" Wide. It only has a pressure drop of 0.1psi and it has 3" inlet/outlet. Basically now my turbo has to fill less volume to build boost. I don't have a tank, it goes from the intercooler to the top of the heat exchanger and from the bottom of the heat exchanger to the pump and from there back to the intercooler. I have a radiator cap/fitting that goes on the hose from the intercooler to the heat exchanger for filling the system.

I am very happy with the setup....the reason they have a bad reputation is because people build a high hp motor...get a really nice intercooler core and then expect a tiny oil cooler to be able to take the heat away from the water....and when it doesn't happen they say the idea doesn't work when in reality its just a poorly designed system.

Best regards,

Chris
Reply
Old Jun 11, 2009 | 10:33 AM
  #38  
Viking War Hammer's Avatar
*** Bless The USA
Tenured Member 15 Years
iTrader: (8)
 
Joined: Jan 2007
Posts: 7,140
Likes: 0
From: Saint Louis / Illinois
Originally Posted by ErnieT
Question is, why the hell would you even risk it? Makes no sense. Even if you run all meth, running an intercooler is still a good idea. Hell, with a rotary you guys should know better than try and take short cuts.
I've seen a few guys pull it off with decent results. Of course, they were running lower boost.

I thought I would give it a shot, apparently the more you compress air, the hotter it will get
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
sherff
Adaptronic Engine Mgmt - AUS
9
Feb 24, 2019 12:09 PM




All times are GMT -5. The time now is 06:03 PM.